Organic EL device, driving method thereof, and electronic apparatus

Abstract

An organic electroluminescent device including: a plurality of pixels, each having a red light emitting element to emit red light, a green light emitting element to emit green light, and a blue light emitting element to emit blue light; and a drive device adjusting a luminance ratio among the red light, the green light, and the blue light by adjusting light emitting time of each of the red light emitting element, the green light emitting element, and the blue light emitting element.

What is claimed is: 
     
       1. An organic electroluminescent device, comprising:
 a plurality of pixels comprising:
 a red light emitting element to emit red light; 
 a green light emitting element to emit green light; 
 a blue light emitting element to emit blue light; 
 a drive element driving each of the red light emitting element, the green light emitting element, and the blue light emitting element based on a signal from a plurality of write scan lines and a signal from a plurality of data lines; and 
 a capacitor storing a characteristic of the drive element; 
 
 a drive device adjusting a luminance ratio among the red light, the green light, and the blue light by adjusting light emitting time of each of the red light emitting element, the green light emitting element, and the blue light emitting element; 
 a first control line directly connected to a first transistor that controls whether the characteristic of the drive element is stored in the capacitor, the first control line being provided parallel to the plurality of write scan lines; 
 a second control line directly connected to a second transistor that controls whether each of the red light emitting element, the green light emitting element, and the blue light emitting element is driven or not by using the drive element having a characteristic compensated based on a content stored in the capacitor, the second control line being provided parallel to the plurality of write scan lines, a drain of the first transistor being directly connected to the source of the second transistor and the drain of the second transistor being directly connected to a corresponding one of the red light emitting element, the green light emitting element, and the blue light emitting element; and 
 a first electrode of the capacitor being directly connected to a third transistor, a fourth transistor, a second electrode of an additional capacitor, and a second electrode of the capacitor, the second electrode of capacitor being directly connected to a gate electrode of a fifth transistor. 
 
     
     
       2. The organic electroluminescent device according to  claim 1 , the drive device adjusting the luminance ratio among the red light, the green light, and the blue light so as to achieve a predetermined white balance. 
     
     
       3. The organic electroluminescent device according to  claim 1 , wherein the drive device renders each of the red light emitting element, the green light emitting element, and the blue light emitting element to emit light at an identical light emission start timing, and individually sets a non-light emission start timing to render each of the red light emitting element, the green light emitting element, and the blue light emitting element to be a non-light emission state so as to adjust the luminance ratio among the red light, the green light, and the blue light. 
     
     
       4. The organic electroluminescent device according to  claim 3  further comprising:
 the plurality of write scan lines being provided for a unit composed of a predetermined number of pixels among the plurality of pixels; 
 a plurality of erase scan lines, each being provided to each of the red light emitting element, the green light emitting element, and the blue light emitting element that are included in each of the predetermined number of pixels, and the plurality of erase scan lines being provided corresponding to the plurality of write scan lines; and 
 the plurality of data lines each being provided to each of the red light emitting element, the green light emitting element, and the blue light emitting element that are included in each of the predetermined number of and extending in a direction perpendicular to the plurality of write scan lines and the plurality of erase scan lines; 
 wherein the drive device renders each of the red light emitting element, the green light emitting element, and the blue light emitting element that are provided in each of the predetermined number of pixels to emit light via the plurality of write scan lines, and renders each of the red light emitting element, the green light emitting element, and the blue light emitting element that are provided in each of the predetermined number of pixels to be the non-light emission state via the plurality of erase scan lines. 
 
     
     
       5. The organic electroluminescent device according to  claim 4 , wherein the drive device divides one frame into a plurality of sub-frames depending on the number of grayscales represented by an image signal supplied to the plurality of data lines, and controls one of a light emission state and the non-light emission state of each of the red light emitting element, the green light emitting element, and the blue light emitting element in each of the plurality of sub-frames. 
     
     
       6. The organic electroluminescent device according to  claim 5 , the drive device controlling the light emitting time of each of the red light emitting element, the green light emitting element, and the blue light emitting element in the plurality of sub-frames so as to be a predetermined time ratio. 
     
     
       7. The organic electroluminescent device according to  claim 1 , wherein the drive device compensates a luminance change with time of each of the red light emitted from the red light emitting element, the green light emitted from the green light emitting element, and the blue light emitted from the blue light emitting element. 
     
     
       8. An electronic apparatus, comprising the organic electroluminescent device according to  claim 1 . 
     
     
       9. The organic electroluminescent device according to  claim 1 , the first control line being connected to a single transistor as the first transistor for each of the red light emitting element, the green light emitting element, and the blue light emitting element.